此程序可以实现两个单片机之间的相互通信；串口采用方式1工作，10位异步接受和发送，波特率可变，由定时器1控制；且含有校验-This program can be achieved between the two microcontrollers communicate with each other　serial port mode 1 using the work of 10-bit asynchronous receive and send, variable baud rate, from Timer 1 control　and contains a checksum